一种基于对向射流的粒子操控方法及其实验研究。
A particle manipulation method and its experimental study based on opposed jets.
作者信息
Zhang Qin, Fan Jibin, Fan Jinbin, Wang Han, Aoyama Hisayuki
机构信息
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China.
Department of Mechanical Engineering and Intelligent Systems, University of Electro-Communications, Tokyo 182-8585, Japan.
出版信息
Biomicrofluidics. 2018 Mar 27;12(2):024110. doi: 10.1063/1.5020600. eCollection 2018 Mar.
A particle manipulation method was presented in this paper based on opposed jets. In such a method, particles were trapped near the stagnation point of the flow field and moved by controlling the position of the stagnation point. The hold direction of the flow to the particle was changed by changing the orientation of the opposed-jet flow field where a particle is trapped. Subsequently, the directional and quantitative movement of the particle in any direction was achieved. Taking micron particles as examples, we analyzed the control mechanism of particles based on opposed jets and evaluated the influence of jet velocity, inner diameter, distance of end face, radial error, and position of capillaries on the particle control performance by simulations. The feasibility of the proposed method was proved by a great number of experiments, and the results demonstrated that particles with the arbitrary size and shape can be trapped and moved directionally and quantitatively by constructing an opposed-jet flow field. The trapping and position control of particles can be manipulated without any contact with proper flow field parameters.
本文提出了一种基于对向射流的粒子操控方法。在这种方法中，粒子被困在流场的驻点附近，并通过控制驻点位置来移动。通过改变粒子被困的对向射流流场的方向，改变了流向粒子的流体方向。随后，实现了粒子在任意方向上的定向和定量移动。以微米级粒子为例，通过模拟分析了基于对向射流的粒子控制机制，并评估了射流速度、内径、端面距离、径向误差和毛细管位置对粒子控制性能的影响。大量实验证明了该方法的可行性，结果表明，通过构建对向射流流场，可以对任意尺寸和形状的粒子进行捕获、定向和定量移动。在适当的流场参数下，无需任何接触即可对粒子进行捕获和位置控制。
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